CPVC Dialock 2 Way Diaphragm Valve

The CPVC Dialock 2 Way Diaphragm Valve uses to control and close dirty or scratched substances. The redesigned internal shape of the body increases the flow coefficient and pressure drop, allowing for delicate, precise shutter adjustments over the entire stroke. The valve is quite small and lightweight. There is an ergonomic and quick locking feature on the handwheel, allowing the handwheel to be moved and secured in any position.

Many different materials, body styles and diaphragms can be used with this CPVC Dialock 2 Way Diaphragm Valve. Wear-style body re-design improves flow rate and allows precise linear flow regulation throughout the valve’s full range of operation. A variety of options and accessories are available with this pneumatically operated version.

This increases the flow rate. In addition, the CPVC Dialog 2 Way Diaphragm Valve allows for precise linear flow control. Through the use of its locking mechanism, the handwheel can be turned and secured in over 300 locations.

CPVC Dialock 2 Way Diaphragm Valve Technical Information

The DK DIALOCK® diaphragm valve is particularly suitable for shutting off and regulating abrasive or dirty fluids. The new internal geometry of the body increases flow coefficient, reduce pressure drop and allows a sensitive and precise adjustment along the entire stroke of the shutter. The DK is extremely compact and very light. The innovative handwheel is equipped with a patented immediate and ergonomic operating locking device that allows it to be adjusted and locked in any position.

• Connection system for solvent weld, threaded and flanged joints
• Optimised fluid dynamic design: maximum output flow rate thanks to the

optimised efficiency of the fluid dynamics that characterise the new inter-
nal geometry of the body

• Internal components in metal, totally isolated from the fluid and external
• Modularity of the range: only 2 handwheel and 4 diaphragm and bonnet
sizes for 7 different valve sizes
• Non-rising handwheel that stays at the same height during rotation,
equipped with a graduated optical indicator protected by a transparent
PVC cap with seal O-Ring
• Bonnet fastening screws in stainless steel protected against the external
environment by PE plugs. Absence of metal parts exposed to the external
environment to prevent any risk of corrosion.
• CDSA (Circular Diaphragm Sealing Angle) system that, thanks to the
uniform distribution of shutter pressure on the diaphragm seal, offers the
following advantages:
− reduction in the tightening torque of the screws fixing the actuator to
the valve body
− reduced mechanical stress on all valve components (actuator, body and
− easy to clean valve interior
− low risk of the accumulation of deposits, contamination or damage to
the diaphragm due to crystallisation
− operating torque reduction

Technical specifications
ConstructionDiaphragm valve with maximized flow rate and
DIALOCK® lockable handwheel
Size rangeDN 15 ÷ 65
Nominal pressurePN 10 with water at 20° C
Temperature range0 °C ÷ 60 °C
Coupling standardsSolvent welding: EN ISO 1452, EN ISO 15493, BS
4346-1, DIN 8063, NF T54-028, ASTM D 2467. Can be
coupled to pipes according to EN ISO 1452, EN ISO
15493, DIN 8062, NF T54-016, ASTM D 1785.
Thread: ISO 228-1, DIN 2999, ASTM D 2464.
Flanging system: ISO 7005-1, EN ISO 1452, EN ISO
15493, EN 558-1, DIN 2501, ANSI B.16.5 cl. 150, JIS B
Reference standardsConstruction criteria: EN ISO 16138, EN ISO 1452, EN
ISO 15493
Test methods and requirements: ISO 9393
Installation criteria: DVS 2204, DVS 2221, UNI 11242
Valve materialBody: PVC-U
Bonnet and handwheel: PP-GR
Position indicator cap: PVC
Seal materialEPDM, FKM, PTFE
Control optionsManual control; pneumatic actuator